Applications of using 4D scanning technologies in biomechanics

Abstract:The analysis of human movement using 4D data is explored in this paper. Using the CAESAR database, reference distributions of body segment volumes and 3D mesh vertices connected to anatomical landmarks were created. A child (10 years old, male) with lower limb asymmetry of idiopathic origin was investigated, comparing the asymmetries seen in “A-pose” and level gait to the reference data. Pelvic tilt curves were calculated from pelvic anatomical markers using either a single vertex or a collection of vertices. The trajectories of pelvic markers, as in conventional marker-based motion analysis, and the distributions of vertices obtained from the CAESAR database, were used for that purpose. The two distributions of pelvic tilt curves were very similar to each other, with mean values differing less than 1º, and standard deviations around 3º in both cases. When the anatomical landmarks were defined as single points, pelvic tilt remained within one standard deviation of the probabilistic distributions of tilt curves but biased towards greater values (2º greater than the means of those distributions) This preliminary study shows the capability of using 4D scanning technology for assessing volumetric asymmetries, opening new frontiers in biomechanics in pathologies that have asymmetric pathological features (e.g. lymphedema).

ISBN:978-3-031-37847-8

Publication year:2023

Keywords:Human medicine

Accessibility:Closed